Dyne Therapeutics ( $DYN ): Analyzing the -30.5% Pullback After Novartis DM1 Trial News (See the latest news for any ticker on Tickeron.) Dyne Therapeutics shares declined about 30.5% over the 30 days through mid-September 2026, falling from roughly $26.00 to approximately $18.06. The selloff was triggered by Novartis reporting that its Phase 3 HARBOR study of del-desiran failed its primary endpoint in myotonic dystrophy type 1 (DM1), raising read-through concerns for Dyne's competing z-basivarsen program. $RNA $RCKT $BBIO $IDYA $CLDX